基于组合Mayr和Cassie电弧模型的弧光接地故障仿真及分析  

Simulation and analysis of arc grounding fault based on combined Mayr and Cassie arc models

作　　者：杨明波 龙毅 樊三军 马格土 Yang Mingbo;Long Yi;Fan Sanjun;Ma Getu(Guiyang Power Supply Bureau, Guizhou Power Grid Co., Ltd., Guiyang 550004, China;State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044,China)

机构地区：[1]贵州电网有限责任公司贵阳供电局,贵阳550004 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电测与仪表》2019年第10期8-13,共6页Electrical Measurement & Instrumentation

基　　金：贵州科技项目(GZKJXM20170166)

摘　　要：弧光接地故障在配电网中发生的概率较大,其动态特性对于检测电弧故障起着十分重要的作用。Mayr、Cassie模型是研究电弧接地故障两种经典模型,适用于描述电弧不同的物理特性。文中以电弧电流为变量建立过渡函数,构造了一种Mayr-Cassie组合模型,该模型综合考虑了电弧对流散热和径向传导散热。在PSCAD/EMTP平台上搭建了单相电弧接地故障模型,分析了电弧电压、电流、电阻的动态特征,并进一步将该模型用于10kV配电网故障分析中,结果表明该模型可准确反映电弧特性。The arc grounding fault in the distribution network is highly possible,and the dynamic characteristics of which play an important role in detecting arc faults. The Mayr and Cassie models are two classical models in the study of arc grounding faults in distribution network,which are suitable for describing different physical properties of arc. In this paper,the transition function is established by using the arc current as a variable,and a Mayr-Cassie combinatorial model is constructed. The model considers both arc convection heat dissipation and radial conduction heat dissipation. The singlephase arcing grounding fault model is built on the PSCAD/EMTP platform. The dynamic characteristics of arc voltage,current and resistance are analyzed. The model is further used in the fault analysis of a specific 10 kV distribution network. The results show that the model can accurately reflect arc characteristics.

关 键 词：Mayr模型 CaSSie模型 过渡函数 动态特征 

分 类 号：TM743[电气工程—电力系统及自动化]